Battery module, battery pack and vehicle

Abstract

The utility model provides a battery module, a battery pack and a vehicle. The battery module comprises a battery column and a fire extinguishing part, the battery column comprises at least two single batteries arranged along a first direction, and an anti-explosion valve is arranged at the top of each single battery; the fire extinguishing part comprises a body part, the body part is located above the battery column, the body part is provided with an inner cavity and a bottom wall facing the battery column, a gaseous fire extinguishing agent is contained in the inner cavity, the bottom wall is provided with a weak part, and the weak part and the anti-explosion valve are arranged correspondingly; the weak part is configured to be capable of breaking or melting through before other parts of the bottom wall under the action of heat flow sprayed out of the anti-explosion valve.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery module, a battery pack and a vehicle. Background Art

[0002] Lithium batteries may cause thermal runaway due to abnormalities. For example, during the charging and discharging process of the battery, due to its own abnormalities or foreign objects on the battery box piercing the insulating bottom film of the battery, discharge arcing occurs, causing the temperature of the single battery to rise abnormally in a short time. At the same time, the explosion-proof valve of the single battery ruptures, generating smoke or combustion. In addition, the more batteries connected in series and parallel in a battery pack, the greater the risk of thermal runaway. Seriously, it will cause combustion or explosion, posing great harm to personnel, equipment and the environment.

[0003] In the existing design of battery modules, the solutions adopted to prevent thermal runaway can only prevent thermal runaway of less than two single batteries. If there are more than two or the positions of short-circuit arcing are more than two, it is difficult to achieve effective control, resulting in greater potential safety hazards in the battery module. Summary of the Utility Model

[0004] A main object of the utility model is to overcome at least one defect of the above-mentioned existing technology, and provide a battery module capable of effectively suppressing thermal runaway.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] According to one aspect of the utility model, there is provided a battery module, which includes a battery row and a fire extinguishing member; the battery row includes at least two single batteries arranged along a first direction, and an explosion-proof valve is provided on the top of the single battery; the fire extinguishing member includes a body portion, the body portion is located above the battery row, the body portion has an inner cavity and a bottom wall facing the battery row, a gaseous fire extinguishing agent is accommodated in the inner cavity, the bottom wall is provided with a weak portion, the weak portion is arranged corresponding to the explosion-proof valve, and the weak portion is configured to be ruptured or melted through prior to other parts of the bottom wall under the action of the heat flow ejected from the explosion-proof valve.

[0007] According to one embodiment of the utility model, the bottom wall is provided with at least two weak portions, and the number of the weak portions is equal to and arranged in one-to-one correspondence with the number of the single batteries in the battery row.

[0008] According to one embodiment of the utility model, the bottom wall is provided with at least one weak portion, and at least one weak portion is simultaneously arranged corresponding to at least two single batteries in the battery row.

[0009] According to one embodiment of the present utility model, wherein: the thickness of the weak part is less than the thickness of other parts of the bottom wall; and / or, the melting point of the material of the weak part is lower than the melting point of the material of other parts of the bottom wall.

[0010] According to one embodiment of the present utility model, the fire extinguishing agent is one of compressed nitrogen, N1230 fire extinguishing agent, and carbon dioxide fire extinguishing agent.

[0011] According to one embodiment of the present utility model, the battery module further includes two end plates, and the two end plates are respectively arranged at two ends of the battery row in the first direction; wherein, the fire extinguishing member includes two assembly parts, and the two assembly parts are respectively connected to two ends of the body part in the first direction, and the two assembly parts are respectively installed on the two end plates.

[0012] According to one embodiment of the present utility model, the battery module further includes a collecting member, the collecting member is connected to the single battery, and the collecting member includes a lead-out part, and the lead-out part is located on a side of the end plate facing away from the single battery; wherein, the assembly part is provided with an avoidance part for avoiding the lead-out part.

[0013] According to one embodiment of the present utility model, the battery module further includes a collecting member, the collecting member is partially located between the single battery and the fire extinguishing member, and the collecting member has a weak area, and the weak area is arranged corresponding to the explosion-proof valve; wherein, the weak area is a through hole, or the weak area is a weak structure configured to be broken or melted through prior to other parts of the collecting member under the action of the heat flow ejected by the explosion-proof valve.

[0014] As can be seen from the above technical solutions, the advantages and positive effects of the battery module proposed by the present utility model are as follows:

[0015] The battery module proposed by the utility model comprises a battery array and a fire extinguishing component; the battery array comprises at least two single cells, and an explosion-proof valve is arranged on the top of the single cell; the fire extinguishing component comprises a main body portion, the main body portion is located above the battery array, the main body portion has an inner cavity and a bottom wall facing the battery array, a gaseous fire extinguishing agent is contained in the inner cavity, and a weak portion is arranged corresponding to the explosion-proof valve, and the weak portion is configured to be broken or melted before other parts of the bottom wall under the action of a heat flow ejected from the explosion-proof valve. Through the above-mentioned structural design, the utility model can utilize the fire extinguishing component to realize the self-triggering fire extinguishing function of the battery module. Specifically, when a single cell has thermal runaway, the weak portion of the bottom wall corresponding to the explosion-proof valve is ruptured or melted through before other portions, so that the gaseous fire extinguishing agent can be directionally sprayed to the area of ​​the single cell having thermal runaway, and the fire extinguishing agent can cover all the single cells, thereby realizing the fire extinguishing function of directionally spraying the fire extinguishing agent. At the same time, it can also play a certain blocking and suppressing role on the high-temperature and high-pressure smoke generated when the single cell has thermal runaway, thereby avoiding the accumulation of high-temperature and high-pressure smoke in the battery pack or the rebound of the spray to other parts of the battery module to cause short circuit or arcing.

[0016] Another main purpose of the present invention is to overcome at least one of the defects of the above-mentioned prior art and provide a battery pack using the above-mentioned battery module.

[0017] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0018] According to one aspect of the present invention, a battery pack is provided, which includes a battery case and a battery module proposed by the present invention and described in the above embodiments, wherein the battery module is arranged in the battery case.

[0019] It can be seen from the above technical solutions that the advantages and positive effects of the battery pack proposed by the utility model are:

[0020] The battery pack proposed in the utility model, by adopting the battery module proposed in the utility model, can realize the self-triggered fire extinguishing function of the battery module and can realize the coverage of all single cells by the fire extinguishing agent, and can also prevent the high-temperature and high-pressure smoke generated during thermal runaway from accumulating in the battery pack or spraying and rebounding to other parts of the battery module to cause short circuit or arcing, thereby improving the ability of the battery pack to suppress thermal runaway.

[0021] Another main purpose of the present invention is to overcome at least one defect of the above-mentioned prior art and provide a vehicle using the above-mentioned battery pack.

[0022] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0023] According to one aspect of the present utility model, there is provided a vehicle, which includes the battery pack proposed by the present utility model and described in the above embodiments.

[0024] As can be seen from the above technical solutions, the advantages and positive effects of the vehicle proposed by the present utility model are as follows:

[0025] For the vehicle proposed by the present utility model, by adopting the battery pack proposed by the present utility model, the ability of the battery pack to suppress thermal runaway can be improved. At the same time, there is no need for the vehicle system to additionally configure a fire extinguishing system, which is beneficial to reducing the production cost of the vehicle and improving the space utilization rate of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] By considering the following detailed description of the preferred embodiments of the present utility model in conjunction with the drawings, various objectives, features and advantages of the present utility model will become more obvious. The drawings are only illustrative diagrams of the present utility model and are not necessarily drawn to scale. In the drawings, the same reference numerals always represent the same or similar components. Among them:

[0027] Figure 1 is a perspective structural view of a battery module shown according to an exemplary embodiment;

[0028] Figure 2 is Figure 1 a perspective exploded view of

[0029] Figure 3 is Figure 2 an enlarged view of part A in

[0030] Figure 4 is Figure 2 a perspective structural view of the fire extinguishing member shown;

[0031] Figure 5 is a perspective structural view of a battery pack shown according to an exemplary embodiment;

[0032] Figure 6 is Figure 5 a side view of

[0033] The reference numerals are explained as follows:

[0034] 100. Battery row;

[0035] 110. Single battery;

[0036] 111. Explosion-proof valve;

[0037] 120. End plate;

[0038] 130. Acquisition member;

[0039] 131. Lead-out part;

[0040] 132. Lead support

[0041] 132. Weak area

[0042] 200. Fire extinguishing part

[0043] 210. Body part

[0044] 211. Weak part

[0045] 220. Assembly part

[0046] 221. Avoidance part

[0047] 300. Module cover plate

[0048] 400. Conductive bar

[0049] 410. Support plate

[0050] 500. Battery box

[0051] X. First direction

[0052] Y. Second direction Detailed implementation mode

[0053] Typical embodiments embodying the features and advantages of the present utility model will be described in detail in the following description. It should be understood that the present utility model can have various variations in different embodiments, all of which do not depart from the scope of the present utility model, and the descriptions and drawings therein are for illustrative purposes in essence and not for limiting the present utility model.

[0054] In the following description of different exemplary embodiments of the present utility model, reference is made to the accompanying drawings, which form a part of the present utility model, and in which different exemplary structures, systems, and steps capable of implementing multiple aspects of the present utility model are shown by way of example. It should be understood that other specific solutions of components, structures, exemplary devices, systems, and steps can be used, and structural and functional modifications can be made without departing from the scope of the present utility model. Moreover, although terms such as "above", "between", "inside" etc. may be used in this specification to describe different exemplary features and elements of the present utility model, these terms are used herein only for convenience, for example, according to the directions of the examples described in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional direction of the structure to fall within the scope of the present utility model.

[0055] Refer to Figure 1, which representatively shows a schematic perspective view of the battery module proposed by the present utility model. In this exemplary embodiment, the battery module proposed by the present utility model is described by taking an in-vehicle battery as an example. It is easy for those skilled in the art to understand that, in order to apply the relevant designs of the present utility model to other types of battery devices, various modifications, additions, substitutions, deletions or other changes are made to the following specific embodiments, and these changes are still within the scope of the principle of the battery module proposed by the present utility model.

[0056] As Figure 1 shown, in an embodiment of the present utility model, the battery module proposed by the present utility model includes a battery row 100 and a fire extinguishing member 200. With reference to Figures 2 to 4 , Figure 2 representatively shows Figure 1 a schematic exploded perspective view; Figure 3 representatively shows Figure 2 an enlarged schematic view of part A in Figure 4 representatively shows a schematic perspective view of the fire extinguishing member 200. The following will describe in detail the structures, connection manners and functional relationships of the main components of the battery module proposed by the present utility model with reference to the above-mentioned drawings.

[0057] As Figures 1 to 4As shown, in one embodiment of the present invention, the battery array 100 includes at least two single cells 110 arranged along a first direction X, and an explosion-proof valve 111 is provided on the top of the single cell 110. The fire extinguishing element 200 includes a main body 210, which is located above the battery array 100. The main body 210 has an inner cavity and a bottom wall facing the battery array 100, and the inner cavity contains a fire extinguishing agent. The bottom wall is provided with a weak portion 211, and the weak portion 211 is arranged correspondingly with the explosion-proof valve 111. The so-called corresponding arrangement can be understood as defining a reference plane parallel to the top surface (or bottom wall) of the single cell 110, on which the orthographic projection of the weak portion 211 at least partially overlaps with the orthographic projection of the explosion-proof valve 111. Among them, the weak portion 211 can be broken or melted before other parts of the bottom wall under the action of the heat flow ejected by the explosion-proof valve 111. Through the above-mentioned structural design, the utility model can utilize the fire extinguishing element 200 to realize the self-triggering fire extinguishing function of the battery module. Specifically, when the single cell 110 has thermal runaway, the weak portion 211 arranged on the bottom wall corresponding to its explosion-proof valve 111 is ruptured or melted through before other portions, so that the fire extinguishing agent can be directionally sprayed to the area of ​​the single cell 110 where the thermal runaway has occurred. The fire extinguishing function of the directional spraying of the fire extinguishing agent is thereby realized, and the fire extinguishing agent can cover all the single cells 110. At the same time, it can also play a certain blocking and suppressing role on the high-temperature and high-pressure smoke generated when the single cell 110 has thermal runaway, thereby avoiding the high-temperature and high-pressure smoke from accumulating in the battery pack or spraying and rebounding to other parts of the battery module to cause a short circuit or arcing.

[0058] like Figure 4 As shown, in one embodiment of the present invention, the bottom wall of the fire extinguishing element 200 may be provided with at least two weak parts 211, and the number of the weak parts 211 is equal to the number of the single cells 110 of the battery array 100 and is arranged one by one. For example, the battery array 100 of the battery module shown in the figure includes 16 single cells 110, and the bottom wall of the fire extinguishing element 200 is provided with 16 weak parts 211. Through the above structural design, the present invention can make the explosion-proof valve 111 of each single cell 110 be individually arranged with a weak part 211, thereby realizing the self-triggered fire extinguishing function for each single cell 110, making the fire extinguishing function more targeted and accurate.

[0059] In some embodiments, the number of the weak portions 211 provided on the bottom wall may also be unequal to the number of the single cells 110 of the battery string 100. That is, at least one weak portion 211 is arranged corresponding to the explosion-proof valves 111 of at least two single cells 110. Still taking the battery string 100 including 16 single cells 110 as an example, 8 weak portions 211 may be provided on the bottom wall, and each weak portion 211 is arranged corresponding to the explosion-proof valves 111 of 2 single cells 110. Of course, in other embodiments, the number of the explosion-proof valves 111 arranged corresponding to each weak portion 211 may not be limited to being equal. Furthermore, in some embodiments, only one weak portion 211 may be provided on the bottom wall of the fire extinguishing member 200, and this weak portion 211 is arranged corresponding to all the single cells 110 of the battery string 100, and none of the above embodiments is limiting.

[0060] In an embodiment of the present invention, the thickness of the weak portion 211 may be less than the thickness of other parts of the bottom wall. Through the above structural design, when a single cell 110 has a thermal runaway, the heat flow ejected from the explosion-proof valve 111 acts on the weak portion 211 of the bottom wall. Since the thickness of the weak portion 211 is thinner than that of other parts of the bottom wall, it can be relatively easily broken through or melted through by the heat flow, thereby realizing the directional spraying of the fire extinguishing agent.

[0061] Based on the above structural design regarding the thickness difference of the weak portion 211, in an embodiment of the present invention, the melting point of the material of the weak portion 211 may be lower than the melting point of the material of other parts of the bottom wall, whereby the weak portion 211 can be more easily broken through or melted through by the heat flow. Of course, when the weak portion 211 adopts the above thickness difference design, the weak portion 211 and other parts of the bottom wall may adopt the same material, that is, have the same melting point. In addition, in other embodiments of the present invention, when the melting point of the material of the weak portion 211 is lower than the melting point of the material of other parts of the bottom wall, the weak portion 211 and other parts of the bottom wall may also have the same thickness. For example, the bottom wall may be a wall surface structure with uniform thickness. Accordingly, the function that the weak portion 211 ruptures or melts through prior to other parts of the bottom wall under the action of the heat flow ejected from the explosion-proof valve 111 can still be realized, and none of the above embodiments is limiting.

[0062] In an embodiment of the present invention, the fire extinguishing agent may be a gaseous fire extinguishing agent, such as compressed nitrogen. In some embodiments, other types of fire extinguishing agents may also be accommodated in the inner cavity of the fire extinguishing agent, such as N1230 fire extinguishing agent or carbon dioxide fire extinguishing agent, and this embodiment is not limiting. Through the above design, by using the above types of fire extinguishing agents, the present invention can achieve that the fire extinguishing agent sprayed out from any weak portion 211 can cover all the single cells 110, further improving the ability to suppress thermal runaway.

[0063] In one embodiment of the utility model, the gaseous fire extinguishing agent contained in the inner cavity of the main body can be given a certain pressure. For example, appropriate pressure can be applied when injecting the fire extinguishing agent into the inner cavity. Accordingly, when any weak portion 211 is ruptured or melted through, the fire extinguishing agent can be discharged toward the single battery 110 in a jet state. The high-pressure jet airflow formed thereby can be used to further enhance the fire extinguishing effect. At the same time, the diffusion of the fire extinguishing agent can be accelerated to achieve faster and more complete coverage of other single batteries 110, thereby further enhancing the ability to suppress thermal runaway.

[0064] like Figure 1 and Figure 2 As shown, in one embodiment of the present invention, the battery module proposed by the present invention further includes two end plates 120, which are respectively arranged at the two ends of the battery column 100 in the first direction X. On this basis, the fire extinguishing element 200 may include two assembly parts 220, which are respectively connected to the two ends of the main body 210 in the first direction X, and the two assembly parts 220 are respectively installed on the two end plates 120. Specifically, the assembly part 220 can be, for example, installed at the screw hole of the end plate 120. Through the above structural design, the utility model can facilitate the assembly of the fire extinguishing element 200 in the battery module, and is suitable for using the fire extinguishing element 200 as a part of the battery module, and there is no need to add additional installation parts, which is conducive to reducing the difficulty of assembly and reducing the number of parts. In some embodiments, the fire extinguishing element 200 can also be installed in the battery module by other means, and specifically can be directly connected or indirectly connected via other installation structures, which is not limited to this embodiment.

[0065] like Figures 1 to 3 As shown, based on the structural design that the fire extinguishing component 200 is installed on the end plate 120 via the assembly portion 220, in one embodiment of the utility model, the battery module proposed by the utility model also includes a collection component 130, and the collection component 130 is connected to the single cell 110. For example, the collection component 130 can be used to collect temperature information and voltage information of the single cell 110, and transmit the collected information to the battery management system (such as BMS, etc.). Among them, the collection component 130 includes a lead-out portion, which is located on the side of the end plate 120 facing away from the single cell 110. It should be noted that the lead-out portion is hidden in the above-mentioned drawings and only the collection component 130 and its lead-out support 132 are retained, that is, the lead-out support 132 is connected to the collection component 130 and is used to connect with the lead-out portion 131. The specific structure of the lead-out portion can be referred to. Figure 6The lead-out portion 131 shown herein. On this basis, the assembly portion 220 of the fire extinguishing member 200 may be provided with an avoidance portion 221 for avoiding the lead-out portion of the acquisition member 130. Specifically, the avoidance portion 221 may be, for example, the through groove shown in the drawings. In some embodiments, the avoidance portion 221 may also be a through hole. Through the above structural design, the utility model can avoid structural interference between the assembly portion 220 of the fire extinguishing member 200 and the lead-out portion of the acquisition member 130, and further improve the structural rationality of the battery module.

[0066] As Figures 1 to 3 shown, in an embodiment of the present utility model, still taking the battery module including the acquisition member 130 as an example, a part of the acquisition member 130 is located between the single battery 110 and the fire extinguishing member 200. On this basis, the acquisition member 130 may have a weak area 132, which is arranged corresponding to the explosion-proof valve 111 of the single battery 110. The so-called corresponding arrangement can be understood as defining a reference plane parallel to the top surface of the single battery 110. On this reference plane, the orthographic projection of the weak area 132 and the orthographic projection of the explosion-proof valve 111 at least partially overlap. Among them, the weak area 132 may be a through hole, or the weak area 132 may also be a weak structure that can be broken or melted through prior to other parts of the acquisition member 130 under the action of the heat flow ejected from the explosion-proof valve 111.

[0067] In an embodiment of the present utility model, the thickness of the weak area 132 may be smaller than the thickness of other parts of the acquisition member 130. Through the above structural design, when the single battery 110 undergoes thermal runaway, the heat flow ejected from the explosion-proof valve 111 acts on the weak area 132 of the acquisition member 130. Since the thickness of the weak area 132 is thinner than that of other parts of the acquisition member 130, it can be relatively easily broken or melted through by the heat flow, so that the heat flow can more easily pass through the acquisition member 130 and act on the weak part 211 of the fire extinguishing member 200.

[0068] Based on the above structural design regarding the thickness difference of the weak area 132, in an embodiment of the present utility model, the melting point of the material of the weak area 132 can be lower than the melting point of the material of other parts of the collecting member 130. Accordingly, it can be made easier for the weak area 132 to be broken through or melted through by the heat flow. Of course, when the weak area 132 adopts the above thickness difference design, the weak area 132 and other parts of the collecting member 130 can adopt the same material, that is, have the same melting point. Additionally, in other embodiments of the present utility model, when the melting point of the material of the weak area 132 is lower than the melting point of the material of other parts of the collecting member 130, the weak area 132 and other parts of the collecting member 130 can also have the same thickness. For example, the collecting member 130 can be a plate-like structure with uniform thickness (for example, the collecting member 130 can be a wiring harness board). Accordingly, the function that the weak area 132 ruptures or melts through prior to other parts of the collecting member 130 under the action of the heat flow ejected by the explosion-proof valve 111 can still be achieved, and it is not limited to the above embodiments.

[0069] It should be noted that, as Figure 2 and Figure 3 shown, in an embodiment of the present utility model, the battery module may further include a module cover plate 300, which is disposed on the top of the battery row 100 and partially located between the single battery 110 and the fire extinguishing member 200. On this basis, when the single battery 110 undergoes thermal runaway, the high-temperature substances ejected by the explosion-proof valve act on the fire extinguishing member 200 after passing through the module cover plate 300. Further, the module cover plate 300 may also be provided with weak structures corresponding to each explosion-proof valve 111. In some embodiments, the battery module may not include the module cover plate 300, and it is not limited to this embodiment.

[0070] As Figure 2 and Figure 3 shown, in an embodiment of the present utility model, the battery module further includes a bus bar 400, which is used to connect the electrode posts of adjacent single batteries 110, and the bus bar 400 is disposed on a support plate 410, and the support plate 410 is partially located between the single battery 110 and the fire extinguishing member 200. On this basis, when the single battery 110 undergoes thermal runaway, the high-temperature substances ejected by the explosion-proof valve act on the fire extinguishing member 200 after passing through the support plate 410. Further, the support plate 410 may also be provided with weak structures corresponding to each explosion-proof valve 111, such as but not limited to the through holes shown in the drawings.

[0071] It should be noted here that the battery modules shown in the drawings and described in this specification are only a few examples of the many battery modules that can adopt the principles of the present utility model. It should be clearly understood that the principles of the present utility model are by no means limited to any details or any components of the battery modules shown in the drawings or described in this specification.

[0072] In summary, the battery module proposed in the present invention includes a battery array 100 and a fire extinguishing component 200; the battery array 100 includes at least two single cells 110, and an explosion-proof valve 111 is arranged on the top of the single cell 110; the fire extinguishing component 200 includes a main body 210, the main body 210 is located above the battery array 100, the main body 210 has an inner cavity and a bottom wall facing the battery array 100, the inner cavity contains a fire extinguishing agent, and the bottom wall is provided with a weak portion 211, the weak portion 211 is arranged corresponding to the explosion-proof valve 111, and the weak portion 211 is configured to be broken or melted before other parts of the bottom wall under the action of the heat flow ejected from the explosion-proof valve 111. Through the above-mentioned structural design, the utility model can utilize the fire extinguishing element 200 to realize the self-triggering fire extinguishing function of the battery module. Specifically, when the single cell 110 has thermal runaway, the weak portion 211 arranged on the bottom wall corresponding to its explosion-proof valve 111 is ruptured or melted through before other portions, so that the fire extinguishing agent can be directionally sprayed to the area of ​​the single cell 110 where the thermal runaway has occurred. The fire extinguishing function of the directional spraying of the fire extinguishing agent is thereby realized, and the fire extinguishing agent can cover all the single cells 110. At the same time, it can also play a certain blocking and suppressing role on the high-temperature and high-pressure smoke generated when the single cell 110 has thermal runaway, thereby avoiding the high-temperature and high-pressure smoke from accumulating in the battery pack or spraying and rebounding to other parts of the battery module to cause a short circuit or arcing.

[0073] Based on the above detailed description of several exemplary embodiments of the battery module proposed in the present invention, an exemplary embodiment of the battery pack proposed in the present invention will be described below.

[0074] See also Figure 5 and Figure 6 , Figure 5 : A three-dimensional structural diagram of a battery pack that can embody the principle of the present utility model in an exemplary embodiment is representatively shown, wherein some structures, such as the cover plate of the battery box 500, are hidden; Figure 6 A representative example is shown in Figure 5 Side view of.

[0075] like Figure 5 and Figure 6 As shown, in one embodiment of the present invention, the battery pack proposed by the present invention includes a battery case 500 and a battery module proposed by the present invention and described in detail in the above embodiments, and the battery module is disposed in the battery case 500.

[0076] like Figure 5 and Figure 6As shown, in an embodiment of the present invention, the battery pack proposed by the present invention may include at least two battery modules, such as, but not limited to, the three battery modules shown in the accompanying drawings. These battery modules may be arranged along a second direction Y perpendicular to the first direction X. Of course, they may also be arranged along other directions. On this basis, each battery module includes a fire extinguishing agent, so that each battery module can realize the fire extinguishing function by using the fire extinguishing member 200 provided therein.

[0077] It should be noted here that the battery packs shown in the accompanying drawings and described in this specification are only a few examples of the many battery packs that can adopt the principles of the present invention. It should be clearly understood that the principles of the present invention are by no means limited to any details or any components of the battery packs shown in the accompanying drawings or described in this specification.

[0078] To sum up, the battery pack proposed by the present invention, by adopting the battery module proposed by the present invention, can realize the self-triggered fire extinguishing function of the battery module, can achieve the coverage of all single cells 110 by the fire extinguishing agent, and can also avoid the accumulation of high-temperature and high-pressure flue gas generated during thermal runaway in the battery pack or the jet rebound to other parts of the battery module, causing short circuit or arcing, thereby enhancing the ability of the battery pack to suppress thermal runaway.

[0079] Based on the above detailed description of an exemplary embodiment of the battery pack proposed by the present invention, an exemplary embodiment of the vehicle proposed by the present invention will be described below.

[0080] In an embodiment of the present invention, the vehicle proposed by the present invention includes the battery pack proposed by the present invention and described in detail in the above embodiment.

[0081] It should be noted here that the vehicles shown in the accompanying drawings and described in this specification are only a few examples of the many vehicles that can adopt the principles of the present invention. It should be clearly understood that the principles of the present invention are by no means limited to any details or any components of the vehicles shown in the accompanying drawings or described in this specification.

[0082] To sum up, the vehicle proposed by the present invention, by adopting the battery pack proposed by the present invention, can enhance the ability of the battery pack to suppress thermal runaway, and at the same time, there is no need for the vehicle system to additionally configure a fire extinguishing system, which is beneficial to reducing the production cost of the vehicle and improving the space utilization rate of the vehicle.

[0083] The exemplary embodiments of the battery module, battery pack, and vehicle proposed by the present utility model have been described and / or illustrated in detail above. However, the embodiments of the present utility model are not limited to the specific embodiments described herein. On the contrary, the components and / or steps of each embodiment can be used independently and separately from the other components and / or steps described herein. Each component and / or each step of one embodiment can also be used in combination with the other components and / or steps of other embodiments. When introducing the elements / components / etc. described and / or illustrated herein, the terms "a", "an", and "the above" etc. are used to indicate the existence of one or more elements / components / etc. The terms "comprising", "including", and "having" are used to mean an open inclusion and refer to the existence of additional elements / components / etc. in addition to the listed elements / components / etc. Furthermore, the terms "first" and "second" etc. in the claims and the specification are only used as labels and are not numerical limitations on their objects.

[0084] Although the battery module, battery pack, and vehicle proposed by the present utility model have been described according to different specific embodiments, those skilled in the art will recognize that modifications can be made to the implementation of the present utility model within the spirit and scope of the claims.

Claims

1. A battery module, characterized in that: include: A battery column, comprising at least two single batteries arranged along a first direction, wherein an explosion-proof valve is provided on the top of each single battery; as well as The fire extinguishing component includes a main body portion, which is located above the battery array, the main body portion has an inner cavity and a bottom wall facing the battery array, the inner cavity contains a fire extinguishing agent, and the bottom wall is provided with a weak portion, which is arranged corresponding to the explosion-proof valve, and the weak portion is configured to be broken or melted before other parts of the bottom wall under the action of the heat flow ejected by the explosion-proof valve.

2. The battery module according to claim 1, characterized in that: The bottom wall is provided with at least two weak parts, and the number of the weak parts is equal to the number of the single batteries in the battery column and is arranged in a one-to-one correspondence.

3. The battery module according to claim 1, characterized in that: The bottom wall is provided with at least one weak portion, and the at least one weak portion is arranged corresponding to at least two single batteries of the battery column.

4. The battery module according to claim 1, characterized in that: The thickness of the weak portion is smaller than the thickness of other portions of the bottom wall; and / or The melting point of the material of the weak portion is lower than the melting point of the material of other portions of the bottom wall.

5. The battery module according to claim 1, characterized in that: The fire extinguishing agent is one of compressed nitrogen, N1230 fire extinguishing agent, and carbon dioxide fire extinguishing agent.

6. The battery module according to claim 1, characterized in that: The battery module also includes two end plates, which are respectively arranged at the two ends of the battery column in the first direction; wherein the fire extinguishing component includes two assembly parts, which are respectively connected to the two ends of the main body in the first direction, and the two assembly parts are respectively installed on the two end plates.

7. The battery module according to claim 6, characterized in that: The battery module also includes a collecting piece connected to the single cell, the collecting piece includes a lead-out portion, the lead-out portion is located on a side of the end plate facing away from the single cell; wherein the assembly portion is provided with an avoidance portion, the avoidance portion is used to avoid the lead-out portion.

8. The battery module according to claim 1, characterized in that: The battery module also includes a collection piece, which is partially located between the single battery and the fire extinguishing piece. The collection piece has a weak area, and the weak area is arranged corresponding to the explosion-proof valve; wherein the weak area is a through hole, or the weak area is a weak structure, and the weak structure is configured to be broken or melted before other parts of the collection piece under the action of the heat flow ejected from the explosion-proof valve.

9. A battery pack, characterized in that: include: Battery box; as well as At least one battery module according to any one of claims 1 to 8, wherein the battery module is arranged in the battery case.

10. A vehicle, characterized in that: A battery pack comprising the battery pack of claim 9.

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